1.Describe the research questions posed in the studies.

2.Describe the research or intervention designs used in the studies i.e. experimental, qualitative, non-experimental, retrospective, longitudinal, descriptive, etc. Be sure to describe the attributes of the design.

3.Compare how the participants were recruited.

4.Compare how data were collected.

5.By type, compare the independent and dependent variables, and any other variables i.e. extraneous, confounding, etc. addressed in the studies. Be sure to describe the attributes of each type.

6.Describe the statistical test used to analyze the study variables.Be sure to describe the attributes of the test and explain the meaning of the score (if any) and its interpretation.

7.Describe the interpretation of the probability of the significance for the statistical test.

8.Compare the study results and conclusions.

9.What larger population is each study intending to represent?

10.What sample design i.e. cohort, case control, random, non-randomized, etc., and sample size and characteristics i.e. pediatric, women of child-bearing age, etc. are used in the studies?

11.Is there a research question that you would like one day to explore?

12.What bias is inherent to your study design (see Assignment 4.1) and did you detect its presence?

Answers are retrieved from the following article:

https://arthritis-research.biomedcentral.com/articles/10.1186/s13075-019-1842-x